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<h3><a name="plot2sky-examples">B.8.2 Examples</a></h3>
<p>Here are some examples of <code>plot2sky</code>:
<dl>
<dt><strong><pre>
stilts plot2sky in=messier.xml lon=RA lat=DEC
layer.pos=mark size.pos=4
layer.txt=label label.txt=Name color.txt=slategrey
</pre></strong></dt>
<dd>Plots the positions of all the Messier objects on the sky,
with text labels giving their object names.
This displays a sphere on the screen that you can rotate/zoom using
the mouse.
</dd>
<dt><strong><pre>
stilts plot2sky projection=aitoff
xpix=600 ypix=300
gridcolour=green labelcolour=black
fontsize=10 gridaa=true texttype=antialias
sex=true crowd=4
</pre></strong></dt>
<dd>This just plots a celestial coordinate grid with no data.
Various options are tweaked to adjust the appearance of the grid.
</dd>
<dt><strong><pre>
stilts plot2sky xpix=1000 ypix=500 fontsize=18 crowd=2
projection=aitoff viewsys=galactic
layer1=mark size1=0
shading1=density densemap1=gnuplot2 densefunc1=log
densesub1=0.5,.95 denseclip1=0.02,1
in1=gums_mw_all.fits
lon1=alpha lat1=delta datasys1=equatorial
icmd1=progress out=mw.pdf
</pre></strong></dt>
<dd>Makes an all-sky plot using an Aitoff projection into
galactic coordinates of a large dataset.
<a href="shading-density.html">Density</a> shading
means that the colour at each point is dependent on
how many points are plotted; the density colour map has been fine-tuned
here to get a specific visual effect.
The sky coordinates in the input file (alpha and delta) are equatorial,
but these are transformed to galactic coordinates for plotting.
The <a href="progress.html">progress</a> filter applied to the input table
displays a progress indicator on the console to see how far it's got.
The result is written to a PDF file.
<p>This command was used to plot the GUMS-10 MW dataset, a simulation
of the milky way stars seen by the Gaia satellite;
The 2.1 billion row plot took about 45 minutes.
</p>
</dd>
</dl>
</p>
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<b>Up: </b><a href="plot2sky.html">plot2sky: Draws a sky plot</a><br>
<b>Previous: </b><a href="plot2sky-usage.html">Usage</a><br>
<hr><i>STILTS - Starlink Tables Infrastructure Library Tool Set<br>Starlink User Note256<br>STILTS web page:
<a href="http://www.starlink.ac.uk/stilts/">http://www.starlink.ac.uk/stilts/</a><br>Author email:
<a href="mailto:m.b.taylor@bristol.ac.uk">m.b.taylor@bristol.ac.uk</a><br>Mailing list:
<a href="mailto:topcat-user@jiscmail.ac.uk">topcat-user@jiscmail.ac.uk</a><br></i></body>
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